package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;

import com.itheima.pojo.User;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

@Component//有点疑问  所有类
//默认为spring中的bean id为   springSecurityUserService
public class SpringSecurityUserService implements UserDetailsService {
    //这里就需要调用服务       通过dubbo
    @Reference
    private UserService userService;

    //根据用户名查询用户信息
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        //调用service
        User user = userService.findByUsername(username);
        if (user == null) {
            return null;
        }
            List<GrantedAuthority> list = new ArrayList<GrantedAuthority>();
            //每个user有多个角色 每个角色有多个权限
            Set<Role> roles = user.getRoles();
            for (Role role : roles) {
                // 遍历角色集合，为用户授予角色
                list.add(new SimpleGrantedAuthority(role.getKeyword()));
                Set<Permission> permissions = role.getPermissions();
                for (Permission permission : permissions) {
                    //遍历权限集合，为用户授权
                    list.add(new SimpleGrantedAuthority(permission.getKeyword()));
                }
            }
            org.springframework.security.core.userdetails.User userDetails = new org.springframework.security.core.userdetails.User(username, user.getPassword(), list);
            return userDetails;

    }
}
